Surveillance review as a procedural problem
Modern surveillance regimes are typically reviewed by some form of authorisation procedure — a judge, a magistrate, a specialised tribunal — that decides, often on an ex parte basis, whether a particular surveillance measure may proceed. The procedural architecture of that authorisation determines what the substantive law of surveillance actually does in practice.
This Report examines how those authorisations are reviewed in five jurisdictions, drawing on published decisions, statutory frameworks, and the work of national oversight bodies where their reports are public.
Findings
The Report's central finding is that the formal availability of prior judicial authorisation correlates weakly with the substantive rigour of the review. In jurisdictions where prior authorisation is universally required but the reviewing body is structurally limited — by caseload, resource, or institutional position — authorisation functions largely as a procedural formality. In jurisdictions where prior authorisation is required less broadly but the reviewing body has institutional standing and substantive jurisdiction, review functions as a meaningful constraint.
Three institutional conditions are associated with substantive review: a specialised reviewing body with its own staff and reasoning practice; a published-decisions tradition (even if redacted) that builds an interpretive record; and the routine availability of a public interest advocate or amicus role at the authorisation stage.
Implications
These findings have implications for surveillance-law reform: the formal architecture matters less than the institutional substance of the reviewing body. Reforms that strengthen the substantive review function — staffing, jurisdiction, published reasoning — do more to constrain surveillance than reforms that merely require more authorisations.